@charset "UTF-8";
:root{--charcoal:#232d36;--charcoal-deep:#172129;--ink:#25323b;--muted:#586671;--steel-blue:#94bfd0;--paper:#fff;--mist:#f3f5f6;--line:#d8dfe3;--shell:1280px;--font:Arial,Helvetica,sans-serif}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:100px}body{margin:0;background:var(--paper);color:var(--ink);font:1rem/1.6 var(--font);-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button{font:inherit}a,button{-webkit-tap-highlight-color:transparent}a:focus-visible,button:focus-visible{outline:3px solid #40758b;outline-offset:6px}::selection{background:var(--steel-blue);color:var(--charcoal)}.shell{width:min(calc(100% - 104px),var(--shell));margin-inline:auto}.skip-link{position:absolute;top:-100px;left:1rem;z-index:20;padding:.75rem 1rem;background:var(--steel-blue)}.skip-link:focus{top:1rem}.site-header{background:var(--charcoal);color:white}.header-inner{display:flex;align-items:center;justify-content:space-between;min-height:110px;border-bottom:1px solid #ffffff26}.brand{display:inline-flex;flex-direction:column;line-height:1}.brand-name{font-size:2.5rem;font-weight:700;letter-spacing:-.065em}.brand-period{color:var(--steel-blue)}.brand-sub{font-size:.75rem;letter-spacing:.2em;margin-top:.55rem;font-weight:500}.nav{display:flex;align-items:center;gap:42px;font-size:.9375rem}.nav a:not(.nav-contact){color:#e1e7eb}.nav a:hover{color:var(--steel-blue)}.nav-contact{display:flex;align-items:center;gap:32px;border:1px solid #ffffff52;padding:10px 20px;border-radius:3px}.nav-contact:hover{background:#ffffff0c}.menu-toggle{display:none}.hero{background:var(--charcoal);color:#fff;padding:53px 0 65px;overflow:hidden}.hero-grid{display:grid;grid-template-columns:1fr 1fr;gap:54px;align-items:center}.hero-copy{padding:12px 0}.eyebrow{font-size:.75rem;line-height:1.5;font-weight:600;letter-spacing:.15em;margin:0 0 28px}.hero .eyebrow{color:var(--steel-blue);display:flex;gap:13px;align-items:center;font-size:.75rem;letter-spacing:.14em}.short-line{display:inline-block;width:28px;height:1px;background:var(--steel-blue);flex-shrink:0}h1,h2,h3,p,figure{margin-top:0}h1{font-size:clamp(4rem,6.7vw,6.2rem);font-weight:400;line-height:1.02;letter-spacing:-.065em;margin-bottom:28px}h1 span{color:var(--steel-blue)}.hero-description{font-size:1.4rem;line-height:1.45;max-width:400px;margin-bottom:15px;letter-spacing:-.025em}.hero-detail{color:#c1cbd2;font-size:1rem;max-width:400px;line-height:1.7;margin-bottom:28px}.button{display:inline-flex;align-items:center;justify-content:space-between;gap:36px;font-size:.9375rem;font-weight:600;line-height:1.5;padding:16px 21px;border-radius:3px;transition:background .2s,transform .2s}.button:hover{transform:translateY(-2px)}.button-lime{background:var(--steel-blue);color:var(--charcoal-deep)}.button-lime:hover{background:#b6d5e1}.button span{font-size:1.3rem;line-height:1}.hero-footnote{display:flex;flex-wrap:wrap;align-items:center;gap:14px;color:#c1cbd2;font-size:.8125rem;margin-top:36px}.tiny-divider{height:13px;width:1px;background:#ffffff40}.hero-visual{position:relative;align-self:stretch;min-height:565px;margin:0;overflow:hidden;background:#35444f;border-radius:3px}.hero-visual img{width:100%;height:100%;position:absolute;inset:0;object-fit:cover;object-position:center center}.hero-visual::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 48%,#121c25bd 100%)}.hero-visual figcaption{position:absolute;z-index:1;bottom:33px;left:34px;right:24px;display:grid;gap:12px;font-size:1.55rem;line-height:1.35;letter-spacing:-.025em}.visual-caption-label{font-size:.75rem;letter-spacing:.12em;color:#e5ebef}.image-corner{position:absolute;top:20px;left:22px;background:#f5f7f9e8;padding:6px 10px;color:var(--charcoal);font-size:.75rem;letter-spacing:.12em;border-radius:2px}.service-strip{background:var(--steel-blue)}.strip-inner{display:grid;grid-template-columns:repeat(3,1fr);padding-block:20px;font-size:.875rem;text-align:center}.strip-inner span+span{border-left:1px solid #232d3635}.section-space{padding:95px 0}.section-heading{display:grid;grid-template-columns:1.35fr 1fr;column-gap:90px;align-items:end;margin-bottom:44px}.section-heading .eyebrow{grid-column:1/-1;margin-bottom:22px;color:var(--muted)}h2{font-size:clamp(2.5rem,4.15vw,3.75rem);font-weight:400;line-height:1.1;letter-spacing:-.055em;margin-bottom:0}.section-intro{font-size:1.0625rem;color:var(--muted);max-width:330px;line-height:1.7;margin:0 0 4px}.services-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}.service-card{background:var(--mist);padding:38px 38px 30px;border:1px solid var(--line);border-radius:3px}.commissioning-card{background:#eaf0f3}.service-card-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:25px}.service-number{font-size:.875rem;color:var(--muted)}h3{font-size:1.6rem;font-weight:400;letter-spacing:-.035em;line-height:1.3;margin-bottom:15px}.service-card>p{max-width:455px;font-size:1rem;line-height:1.7;color:var(--muted);min-height:82px;margin-bottom:25px}.service-list{list-style:none;margin:0 0 28px;padding:0}.service-list li{position:relative;padding:11px 0 11px 24px;border-top:1px solid #cbd5dc;font-size:.9375rem}.service-list li::before{content:"+";position:absolute;left:0;color:#4e7182;font-size:1rem}.text-link{display:flex;justify-content:space-between;align-items:center;gap:15px;padding-top:7px;font-size:.9375rem;font-weight:600}.text-link:hover{text-decoration:underline;text-underline-offset:4px}.text-link span{font-size:1.35rem}.mvhr-note{color:var(--muted);font-size:.9375rem;max-width:890px;margin:27px 0 0;line-height:1.8}.mvhr-note strong{color:var(--ink)}.approach{border-top:1px solid var(--line);padding-top:85px;padding-bottom:90px}.approach-grid{display:grid;grid-template-columns:1fr 1.05fr;gap:100px}.approach .eyebrow{color:var(--muted);margin-bottom:23px}.approach-copy{margin-top:24px;max-width:370px;color:var(--muted)}.personal-note{display:flex;gap:15px;align-items:center;margin-top:33px}.initials{height:46px;width:46px;display:grid;place-items:center;background:var(--mist);border:1px solid var(--line);font-size:.8125rem;border-radius:50%}.personal-note strong,.personal-note div>span{display:block;font-size:.875rem;line-height:1.65}.personal-note div>span{color:var(--muted);font-size:.8125rem}.steps{list-style:none;padding:0;margin:0}.steps li{display:flex;gap:22px;padding:27px 0;border-top:1px solid var(--line)}.steps li:first-child{padding-top:0;border-top:0}.step-number{font-size:.8125rem;line-height:2;color:var(--muted)}.steps h3{font-size:1.25rem;margin-bottom:10px}.steps p{font-size:1rem;color:var(--muted);margin:0;line-height:1.7}.contact{background:var(--charcoal);color:white}.contact-grid{display:grid;grid-template-columns:1.15fr 1fr;gap:100px}.contact .eyebrow{color:var(--steel-blue);margin-bottom:25px}.contact h2{font-size:clamp(2.5rem,4.1vw,3.65rem)}.contact-grid>div>p:not(.eyebrow){color:#c4cfd6;font-size:1rem;margin:25px 0 0;max-width:410px}.contact-details{padding-top:3px}.contact-email{font-size:clamp(1.6rem,2.7vw,2.45rem);font-weight:400;letter-spacing:-.035em;line-height:1.3;display:block;overflow-wrap:anywhere}.contact-email span{margin-left:10px;color:var(--steel-blue)}.contact-email:hover{color:var(--steel-blue)}.contact-details .button{margin-top:25px}.button-light{background:var(--steel-blue);color:var(--charcoal);min-width:192px}.button-light:hover{background:#b6d5e1}.location{display:block;color:#c4cfd6;font-size:.8125rem;margin-top:20px}.footer{background:var(--charcoal-deep);color:#bac7d0;padding:31px 0}.footer-inner{display:flex;align-items:center;justify-content:space-between;gap:30px}.footer-brand{color:#fff}.footer-brand .brand-name{font-size:1.75rem}.footer-brand .brand-sub{font-size:.75rem;margin-top:6px}.footer p{font-size:.75rem;margin:0}.footer p:last-child{text-align:right}
@media(min-width:1600px){.hero{padding-top:64px;padding-bottom:76px}.hero-visual{min-height:600px}}
@media(max-width:1050px){.shell{width:calc(100% - 64px)}.hero-grid{gap:30px}.hero .eyebrow{font-size:.75rem;letter-spacing:.09em}.hero-visual{min-height:520px}h1{font-size:5rem}.hero-description{font-size:1.25rem}.hero-visual figcaption{font-size:1.35rem;left:24px}.hero-footnote{gap:9px;font-size:.75rem}.section-heading{gap:35px}.service-card{padding:28px}.service-card>p{min-height:109px}.approach-grid,.contact-grid{gap:55px}.nav{gap:27px}}
@media(max-width:760px){html{scroll-padding-top:20px}.shell{width:calc(100% - 40px)}.header-inner{min-height:89px}.brand-name{font-size:2.1rem}.brand-sub{font-size:.75rem}.site-header{position:relative;z-index:5}.menu-toggle{display:flex;align-items:center;gap:10px;background:none;border:1px solid #ffffff45;border-radius:3px;padding:9px 11px;color:white;font-size:.875rem;cursor:pointer}.nav{display:none;position:absolute;left:0;top:100%;width:100%;padding:20px;background:var(--charcoal-deep);border-bottom:1px solid #ffffff30;gap:8px;box-shadow:0 10px 15px #0002}.nav.is-open{display:grid}.nav a{padding:12px}.nav-contact{border:0}.hero{padding:38px 0 30px}.hero-grid{grid-template-columns:1fr;gap:32px}.hero-copy{padding:0}.hero .eyebrow{font-size:.75rem;letter-spacing:.12em;margin-bottom:25px}h1{font-size:clamp(3.8rem,12vw,5.5rem);margin-bottom:25px;letter-spacing:-.06em}.hero-description{font-size:1.25rem;max-width:380px}.hero-detail{max-width:430px;font-size:1rem}.hero-footnote{font-size:.75rem;margin-top:25px;gap:12px}.hero-visual{min-height:0;aspect-ratio:1.2}.hero-visual img{object-position:center 45%}.hero-visual figcaption{bottom:24px;font-size:1.45rem;gap:10px}.visual-caption-label{font-size:.75rem}.strip-inner{grid-template-columns:1fr;gap:0;padding-block:7px;font-size:.875rem}.strip-inner span{padding:10px}.strip-inner span+span{border-left:0;border-top:1px solid #232d3625}.section-space{padding:62px 0}.section-heading{grid-template-columns:1fr;gap:22px;margin-bottom:30px}.section-heading .eyebrow{margin-bottom:0}.eyebrow{font-size:.75rem}h2{font-size:2.85rem}.section-intro{font-size:1rem;max-width:400px}.services-grid{grid-template-columns:1fr;gap:18px}.service-card{padding:26px}.service-card-top{margin-bottom:20px}.service-card>p{min-height:0;margin-bottom:22px}.service-card h3{font-size:1.65rem}.service-list{margin-bottom:21px}.service-list li{font-size:.9375rem}.mvhr-note{font-size:.9375rem}.approach-grid{grid-template-columns:1fr;gap:42px}.approach-copy{max-width:420px}.personal-note{margin-top:24px}.steps li{padding:24px 0}.steps li:last-child{padding-bottom:0}.contact-grid{grid-template-columns:1fr;gap:34px}.contact h2{font-size:2.75rem}.contact-email{font-size:2.1rem}.contact-details{border-top:1px solid #ffffff26;padding-top:28px}.contact-grid>div>p:not(.eyebrow){margin-top:20px}.footer-inner{flex-direction:column;align-items:flex-start;gap:19px}.footer p{font-size:.8125rem}.footer p:last-child{text-align:left}.footer-brand{margin-bottom:3px}}
@media(max-width:370px){.shell{width:calc(100% - 32px)}.hero .eyebrow{font-size:.75rem}.short-line{width:18px}.hero-description{font-size:1.125rem}.hero-footnote{font-size:.75rem;gap:8px}.service-card{padding:22px}h2,.contact h2{font-size:2.45rem}.contact-email{font-size:1.85rem}.hero-visual figcaption{left:20px;font-size:1.25rem}.text-link{font-size:.875rem}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{transition:none!important;animation:none!important}}

/* Ventilation guidance and service expansion */
.nav{gap:26px}.services-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.service-card{padding:30px}.service-card>p{min-height:135px}.service-card h3{font-size:1.5rem}.service-symbol{font-size:2rem}.validation-card{background:#f1f3f5}.why{background:var(--charcoal-deep);color:white}.why-grid{display:grid;grid-template-columns:1fr 1.2fr;gap:90px}.why .eyebrow{color:var(--steel-blue)}.why p:not(.eyebrow){color:#c9d5dd}.lead{font-size:1.5rem;line-height:1.45}.benefit-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px 30px;margin-top:34px}.benefit-grid h3{font-size:1.125rem;color:var(--steel-blue);margin-bottom:8px}.benefit-grid p{margin-bottom:0}.important-note{border-top:1px solid #ffffff35;padding-top:24px;margin:28px 0 0}.system-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}.system-card{border:1px solid var(--line);padding:30px 26px;display:flex;flex-direction:column}.system-card:first-child{border-top:5px solid var(--charcoal);padding-top:26px}.system-tag,.project-label{font-size:.875rem;font-weight:700;letter-spacing:.1em;color:var(--muted)}.system-card h3{font-size:2.5rem;margin-bottom:3px}.system-name{min-height:52px;color:var(--muted);font-size:1rem}.system-card>p:not(.system-tag):not(.system-name):not(.best-fit){min-height:156px}.tradeoff{border-top:1px solid var(--line);padding-top:22px}.tradeoff h4{font-size:1rem;margin:0 0 8px}.tradeoff p{color:var(--muted);margin-bottom:24px}.best-fit{margin:auto 0 0;padding-top:20px;border-top:1px solid var(--line);font-size:1rem}.source-note{font-size:.875rem;color:var(--muted);margin:24px 0 0}.source-note a{text-decoration:underline;text-underline-offset:4px}.retrofit{background:var(--mist)}.project-grid{display:grid;grid-template-columns:1fr 1fr;gap:60px}.project-grid article+article{border-left:1px solid #c9d3da;padding-left:60px}.project-label{display:block;margin-bottom:18px}.project-grid h3{font-size:1.75rem}.project-grid p,.project-grid li{color:var(--muted)}.project-grid ul{padding-left:20px}.project-grid li{padding:6px 0}.retrofit-callout{border-top:1px solid #c9d3da;margin-top:35px;padding-top:28px;display:grid;grid-template-columns:1fr 1.5fr;gap:15px 40px}.retrofit-callout strong{font-size:1.3rem;font-weight:500}.retrofit-callout a{grid-column:2;font-weight:700;text-decoration:underline;text-underline-offset:5px}.checks{border-bottom:1px solid var(--line)}.check-list article{border-top:1px solid var(--line);padding:22px 0}.check-list article:first-child{border-top:0;padding-top:0}.check-list h3{font-size:1.35rem}.check-list p{color:var(--muted);margin:0}.approach{border-top:0}.faq{background:var(--mist)}.faq-grid{display:grid;grid-template-columns:1fr 1.4fr;gap:70px}.faq details{border-bottom:1px solid #cbd5dc;padding:21px 0}.faq details:first-child{padding-top:0}.faq summary{cursor:pointer;font-size:1.125rem;font-weight:500;padding-right:12px}.faq details p{color:var(--muted);margin:16px 0 0}.faq summary:focus-visible{outline:3px solid #40758b;outline-offset:6px}.eyebrow{font-size:.875rem}.service-strip .strip-inner{font-size:1rem}.footer p{font-size:.875rem}
@media(max-width:1050px){.services-grid,.system-grid{gap:14px}.service-card,.system-card{padding:24px 20px}.service-card>p,.system-card>p:not(.system-tag):not(.system-name):not(.best-fit){min-height:0}.why-grid{gap:40px}.nav{gap:18px}.project-grid{gap:30px}.project-grid article+article{padding-left:30px}}
@media(max-width:850px){.services-grid,.system-grid{grid-template-columns:1fr}.service-card>p{max-width:none}.system-name{min-height:0}.best-fit{margin-top:0}.why-grid,.faq-grid{grid-template-columns:1fr;gap:36px}.service-card h3{font-size:1.7rem}.project-grid{grid-template-columns:1fr;gap:24px}.project-grid article+article{padding:28px 0 0;border-left:0;border-top:1px solid #c9d3da}.retrofit-callout{grid-template-columns:1fr}.retrofit-callout a{grid-column:auto}}
@media(max-width:450px){.benefit-grid{grid-template-columns:1fr}.hero .eyebrow{letter-spacing:.07em}.lead{font-size:1.25rem}}

.phone-contact{display:flex;flex-wrap:wrap;align-items:center;gap:12px 24px;margin-top:28px;padding-top:24px;border-top:1px solid #ffffff35}.contact-phone{font-size:1.4rem;white-space:nowrap}.whatsapp-link{color:var(--steel-blue);font-size:1rem;text-decoration:underline;text-underline-offset:5px}.contact-phone:hover{color:var(--steel-blue)}

.qualifications{padding:70px 0 85px;border-top:1px solid var(--line)}.qualifications-grid{display:grid;grid-template-columns:1.1fr 1fr;gap:70px;align-items:center}.qualifications h2{font-size:clamp(2rem,3.2vw,3rem)}.qualifications p:not(.eyebrow){color:var(--muted);max-width:560px;margin:24px 0 0}.qualification-badges{display:grid;grid-template-columns:1fr 1fr;gap:24px}.qualification-badges figure{margin:0;text-align:center}.qualification-badges img{display:block;width:100%;max-width:220px;height:auto;margin:0 auto}.qualification-badges figcaption{font-size:.875rem;color:var(--muted);margin-top:12px}@media(max-width:850px){.qualifications-grid{grid-template-columns:1fr;gap:32px}.qualification-badges{max-width:500px}.qualifications{padding:55px 0}.qualification-badges img{max-width:200px}}

/* Subtle, continuous airflow follows the supply valve without a callout. */
.hero-visual img{object-position:70% center}
.airflow-overlay{position:absolute;inset:0;width:100%;height:100%;z-index:2;pointer-events:none;opacity:0;transition:opacity .2s}
.airflow-ready .airflow-overlay{opacity:1}
.flow-path{stroke:url(#airflow-fade)}
.flow-guide{stroke-width:7;opacity:.07}
.flow-moving{stroke-width:1.8;stroke-dasharray:120 380;opacity:.65;animation:supply-flow 8s linear infinite}
.hero-visual figcaption{z-index:3;pointer-events:none}
.hero-visual .visual-caption-label{font-size:.75rem}
@keyframes supply-flow{to{stroke-dashoffset:-1000}}
@media(max-width:760px){.hero-visual{min-height:320px}}

/* Keep the CTG mark and render its company name as crisp, readable text. */
.brand{align-items:center;gap:9px;flex-shrink:0;width:236px}
.brand-logo-frame{position:relative;display:block;width:236px;aspect-ratio:1322/330;overflow:hidden;background:var(--charcoal)}
.brand-logo{position:absolute;display:block;width:134.19%;height:auto;max-width:none;left:50%;top:-70.6%;transform:translateX(-50%)}
.brand-wordmark{display:block;max-width:100%;text-align:center;color:#fff;font-size:.875rem;font-weight:500;line-height:1.3;letter-spacing:.06em;text-transform:uppercase}
.header-inner{min-height:118px;gap:24px}
.footer-brand .brand-logo-frame{width:220px}
.footer-brand{width:220px}
.footer{background:var(--charcoal);border-top:1px solid #ffffff14}
.hero-detail{margin-bottom:12px}
.hero-detail strong{font-weight:600;color:#fff}
.hero-registration{color:var(--steel-blue);font-size:.9375rem;line-height:1.5;margin:0 0 28px}
.hero-actions{display:flex;align-items:stretch;flex-wrap:wrap;gap:12px}
.hero-actions .button{justify-content:center;gap:0}
.button-whatsapp{border:1px solid #94bfd099;background:transparent;color:#e3f1f7;padding:15px 21px}
.button-whatsapp:hover{background:#94bfd018;border-color:var(--steel-blue)}
.qualifications .registration-note{padding-top:20px;border-top:1px solid var(--line)}
.qualifications .registration-note strong{color:var(--ink)}
@media(max-width:1050px){.header-inner{gap:18px}.header-inner .brand{width:212px}.brand-logo-frame{width:212px}.brand-wordmark{letter-spacing:.025em}}
@media(max-width:760px){.header-inner{min-height:106px;gap:16px}.header-inner .brand{width:200px}.header-inner .brand-logo-frame{width:192px}.header-inner .brand-wordmark{font-size:.8125rem;letter-spacing:.025em}}
@media(max-width:370px){.header-inner{gap:10px}.header-inner .brand{width:188px}.header-inner .brand-logo-frame{width:184px}.header-inner .brand-wordmark{letter-spacing:0}.hero-actions .button{width:100%}}
@media(min-width:1051px){.hero-grid{grid-template-columns:minmax(0,.85fr) minmax(0,1.15fr);gap:32px}}

/* Keep the supporting lines with the headings they explain. */
.section-heading-stacked{display:block;max-width:850px}
.section-heading-stacked h2{margin-bottom:22px}
.section-heading-stacked .section-intro{max-width:650px;font-size:1.125rem;line-height:1.6;margin:0}
.retrofit .section-heading-stacked .section-intro{color:var(--ink)}
.service-card h3{font-weight:700}

/* Official NSAI artwork with half-height clear space on a white background. */
.qualification-badges .nsai-mark{grid-column:1/-1;display:flex;justify-content:center}
.nsai-clearspace{display:flex;align-items:center;justify-content:center;padding:80px;background:#fff}
.qualification-badges .nsai-mark img{width:auto;height:160px;max-width:none;margin:0}

/* Carroll Technical uses a CT monogram with its name in readable type. */
.brand,.header-inner .brand{width:200px}
.brand-logo-frame,.header-inner .brand-logo-frame{width:200px;aspect-ratio:1983/793;background:transparent}
.brand-logo{position:static;width:100%;height:100%;max-width:100%;object-fit:contain;transform:none}
.footer-brand{width:188px}
.footer-brand .brand-logo-frame{width:188px}
@media(max-width:370px){.header-inner .brand{width:176px}.header-inner .brand-logo-frame{width:176px}.brand-wordmark{font-size:.8125rem}}